APA (7th ed.) Zitazioa

Carr, E. H. (1964). The twenty years' crisis 1919-1939: An introduction to the study of international relations. Harper Torchbooks.

Chicago Style (17th ed.) Zitazioa

Carr, Edward Hallett. The Twenty Years' Crisis 1919-1939: An Introduction to the Study of International Relations. Nueva York: Harper Torchbooks, 1964.

MLA (9th ed.) Zitazioa

Carr, Edward Hallett. The Twenty Years' Crisis 1919-1939: An Introduction to the Study of International Relations. Harper Torchbooks, 1964.